Who cares about normal music, when your playing some badass slowed down tunes you feel like a boss. There is still sound pressure down at those levels so you will feel it.
Voted. For daily I think 20-30Hz is best. My opinion of course. Doesn't mean I don't want to experience anything else, just in my daily driver that's where I want to be.
im a huge fan of the 15-25hz range. for daily id probobly enjoy being able to go down to 25hz or so. but for fun id rather be able to play a 15hz tone with authority. unfortunatly, the misses is the exact opposite. she is happy with just the TV speakers... me, i like to try and catch the pictures falling off the walls and glue the crap on the shelves down.